The term CLOSING PART OF A PIECE can be summarized as a CODA, which is a four-letter musical term. A CODA is a passage of music that comes at the end of a piece and serves to conclude it. It often contains a recapitulation of earlier themes or motifs, and is usually longer than the preceding sections of the piece. In classical music, codas are typically used to bring a symphony or concerto to a satisfying conclusion.